Microstructure and characterization of aluminum-incorporated calcium silicate hydrates (C-S-H) under hydrothermal conditions.

ABSTRACT: The phase assembly and microstructure of the aluminum-incorporated CaO-SiO₂-H₂O system, which is technologically important in autoclaved building materials, catalysis and waste management, were investigated using XRD, SEM, FTIR and NMR depending on aluminum addition, reaction temperature and curing time. The content of each phase was obtained using the MAUD program based on the Rietveld refinement. The results revealed that the formation of the tobermorite phase was promoted at Al/(Al + Si) ≤ 0.03, and subsequently retarded by higher aluminum addition, which was corroborated by the presence of more low polymerized and cross-linked (alumino)silicate chains. The phase purity decreased with increasing aluminum addition. Aluminum changed the morphology of tobermorite from

SUBMITTER: Qu X 

PROVIDER: S-EPMC9086973 | biostudies-literature | 2018 Aug

REPOSITORIES: biostudies-literature